ASTROSAT CZTI

Data Quality Report

Orbit 41937

Creation date: 2024-06-27T22:34:42.710979
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A12_099T03_9000005720_41937cztM0_level2.fits modeM0/AS1A12_099T03_9000005720_41937cztM0_level2_quad_clean.evt
Size (bytes)610,254,72078,341,760
Size582.0 MB 74.7 MB
Events in quadrant A4,863,820581,986
Events in quadrant B2,782,358650,535
Events in quadrant C3,206,452587,316
Events in quadrant D11,344,163198,071

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0178303
B0114152
C0124712
D0370932

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01020
B01020
C01020
D01020

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0290
B0290
C0290
D0300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A505855410.952946%
B5058410.810597%
C50582675.278766%
D5058361371.431396%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 7061 5059 491 491 6.95% 9.71%
B 7061 5059 33 33 0.47% 0.65%
C 7061 5059 251 251 3.55% 4.96%
D 7061 5059 3609 3609 51.11% 71.34%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 14 24 2064907 17724.03 574 564 116.5
A 10 83 497172 4263.77 574 564 116.5
A 15 223 70210 597.97 574 564 116.5
B 0 229 219633 1946.14 590 573 112.6
B 5 255 159164 1408.93 590 573 112.6
B 0 245 73709 649.74 590 573 112.6
C 0 10 696796 5372.68 566 571 129.6
C 15 214 202044 1554.74 566 571 129.6
C 14 254 59136 451.94 566 571 129.6
D 12 79 9313447 97246.95 391 380 95.8
D 13 249 328393 3425.11 391 380 95.8
D 1 52 53198 551.52 391 380 95.8

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter